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Prediction of the non-fermentable energy fraction of grass silage using near infrared reflectance spectroscopy (NIRS)

Published online by Cambridge University Press:  05 November 2021

E. R. Deaville  and
D. I. Givens
E. R. Deaville
Affiliation:
Feed Evaluation & Nutritional Sciences, ADAS Dairy Research Centre, Drayton Manor Drive, Alcester Road, Stratford-upon Avon, CV37 9RQ UK
D. I. Givens
Affiliation:
Feed Evaluation & Nutritional Sciences, ADAS Dairy Research Centre, Drayton Manor Drive, Alcester Road, Stratford-upon Avon, CV37 9RQ UK
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Extract

The new metabolisable protein system (AFRC, 1992) introduces the requirement to distinguish between the energy in feeds which is fermentable (available for microbial growth) and that which is non-fermentable (available to the host animal; NFE). Fermented forages such as grass silage (GS) may contain substantial amounts of fermentation acids (FA) (volatile fatty acids (VFA) and lactic acid (LA)) and therefore, contain a considerable proportion of NFE. The aim of the present experiment was to investigate the use of near infrared reflectance spectroscopy (NIRS) as a rapid method for predicting the FAs in fresh (undried) GS.

Type
Techniques
Information
Proceedings of the British Society of Animal Science , Volume 1996 , March 1996 , pp. 218
Copyright
Copyright © The British Society of Animal Science 1996

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References

AFRC, 1992. Technical Committee on Responses to Nutrients, Report No. 9. Nutritive Requirements of Ruminant Animals: Protein. Nutrition Abstracts and Reviews, Series B 62 (12): 787–835 Google Scholar
Barnes, R. J., Dhanoa, M. S. and Lister, S. J. 1989. Standard normal variate transformation and de-trending of near infrared diffuse reflectance spectra. Applied Spectroscopy 43: 772–777.10.1366/0003702894202201CrossRefGoogle Scholar